tracks, the platforms in Zeuthen (1897, formerly Hankels Ablage) and Eichwalde (1898) were relocated to the suburban tracks. In 1929, these lines were electrified with side-contact third rail and later became part of the Berlin S-Bahn network. In 1951, the S-Bahn tracks were extended to Königs Wusterhausen. One of the two railway tracks was dismantled after 1945 to provide reparations. The gradual replacement of the second track began from 1970, but the vast majority of the line over a length of 112.9 km between Lübbenau and Görlitz is still single-track. In 1952, Görlitz station in Berlin was closed for passenger traffic, although freight traffic continued to operate there until 1986. In 1988, the mainline tracks from Berlin Grünau Cross to Lübbenau were electrified with overhead catenary on the 15 kV 16.7 AC system and, in 1989, the catenary was extended to Cottbus. In February 2010, the double-track, electrified eastern connection of the new Berlin Brandenburg Airport (BER) gained planning approval and was completed just a year later. It connects with the Görlitz railway over a single-track northern and a single-track southern connecting curve at level junctions between Eichwalde and Grünau. The old freight track to the tank farm at Berlin-Schönefeld Airport South (Kerosinbahn, "jet fuel"—not "kerosene"—railway), which began at Grünau station, was taken out of service at the end of March 2011 and subsequently dismantled. Since then, operations to the tank farm and the BER concrete plant have been carried out on the new tracks from the eastern connection; the siding branches off west of the A 113 and is electrified to the transfer yard. By a decision of 23 July 2012, the Federal Railway Authority declared a area, in the district of Treptow-Köpenick, located between track-kilometre 0.9 and 2.2, to be free of rail operations. This is the section between Landwehr Canal and the Ringbahn area, including the former south curve. Upgrade of the line The shortest travel time from Görlitz to Berlin for express trains was 3 hours 19 minutes in 1900, 3 hours 8 minutes in 1941 and 2 hours 41 minutes today with a change in Cottbus. Berlin–Görlitz upgraded line The upgrade of the line is listed as a priority requirement in the Federal Transport Infrastructure Plan 2003 (Bundesverkehrswegeplan). The ABS Berlin–Görlitz (Berlin–Görlitz upgraded line) project envisages doubling the track between Lübbenau and Cottbus, the increase of the line speed to 160 km/h and the electrification